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Java Gaming Talk

Hi there, I wanted to start this thread to let people talk about conceptial ideas about game development, specifically in java.
Please feel free to ask your own questions but I wanted to start by asking peoples opinion on coordinate (as opposed to tile-based) pathfinding. It seems like a hugely key feature to so many games and I cannot for the life of me come up with a feasible approach to the problem. I have read up on many algorithms to complete the task and they seem to approach the problem on a mathmatical level rather than explaining how the pathfinding system should actualy work. I am very interested in knowing how the proffesional developers would approach many of these different problems.

For some background I have worked with java for over two years and have written many 2D games, many of them using complex AI and tilebased pathfinding systems.

If anyone has experience with Coordinate pathfinding or would also be interested in being able to, please post some comments on the subject, Thanks!

(P.s It is my intention to go on to discuss visual effects in games such as fog-of-war and Display issues such as working with different resolutions.)